11 mark
What is the current at point P in the circuit?
0.5 A
7.5 A
15.0 A
20.5 A
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3.3 Series & Parallel Circuits
11 mark
Calculate the power dissipated by resistor R.
3 W
12 W
15 W
30 W
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11 mark
Which voltage is the maximum voltage made when four 1.5 V cells are connected in series?
0 V
1.5 V
3.0 V
6.0 V
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21 mark
This is a circuit.
Which letter A, B, C or D shows the part of the circuit that carries a current of 2A?
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31 mark
A student has 3 identical resistors. She arranges them in four different ways.
Which arrangement has the most resistance?
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41 mark
The table shows the current and potential difference for four different lamps.
Which lamp has the highest power?
Use the equation: power = potential difference × current
| Current (A) | Potential difference (V) | |
| A | 2 | 5 |
| B | 3 | 4 |
| C | 4 | 2 |
| D | 5 | 1 |
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51 mark
Which item uses the most power?
Use the equation: power = potential difference × current
| Item | Current (A) | Potential difference (V) | |
| A | Calculator | 0.1 | 3 |
| B | Mobile Phone | 1.0 | 5 |
| C | Radio | 0.5 | 12 |
| D | Torch | 1.2 | 6 |
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61 mark
The current in a 12 Ω resistor is 9.0 A.
How much power is dissipated?
108 W
972 W
1 296 W
11 664 W
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